function BookManager::bookTreeAllData

Overrides BookManagerInterface::bookTreeAllData

File

core/modules/book/src/BookManager.php, line 484

Class

BookManager

Defines a book manager.

Namespace

Code

public function bookTreeAllData($bid, $link = NULL, $max_depth = NULL) {
    $tree =& drupal_static(__METHOD__, []);
    $language_interface = \Drupal::languageManager()->getCurrentLanguage();
    // Use $nid as a flag for whether the data being loaded is for the whole
    // tree.
    $nid = isset($link['nid']) ? $link['nid'] : 0;
    // Generate a cache ID (cid) specific for this $bid, $link, $language, and
    // depth.
    $cid = 'book-links:' . $bid . ':all:' . $nid . ':' . $language_interface->getId() . ':' . (int) $max_depth;
    if (!isset($tree[$cid])) {
        // If the tree data was not in the static cache, build $tree_parameters.
        $tree_parameters = [
            'min_depth' => 1,
            'max_depth' => $max_depth,
        ];
        if ($nid) {
            $active_trail = $this->getActiveTrailIds($bid, $link);
            $tree_parameters['expanded'] = $active_trail;
            $tree_parameters['active_trail'] = $active_trail;
            $tree_parameters['active_trail'][] = $nid;
        }
        // Build the tree using the parameters; the resulting tree will be cached.
        $tree[$cid] = $this->bookTreeBuild($bid, $tree_parameters);
    }
    return $tree[$cid];
}